Dear doctori had protected sex (by condom) with a sex-worker woman, 20 days ago. i don't know any thing about her health. i am worried about hiv. is it possible that i might have contractedit?

See below: Having sex with a sex worker is a high risk behavior for developing sexually transmitted infection, HIV and otherwise. Using condoms properly and consistently certainly diminishes the risk, but nothing is 100% (aside from not doing it in the first place). I wold recommend that you see a doctor to get tested if you areworried about it.

Get tested for STDs: Most people w/ a new HIV infection will test positive by approx 25 days post exposure. Although u should get tested sometime around a month post exposure, it's also recommended that u get tested again 12 weeks after the exposure. Be sure to get comprehensive std testing along w/ HIV testing. See sexualhealth.Com or go to a local std clinic or primary care doc. Use condoms and avoid sex workers.

HIV risk: Protected sex using a condom reduces but does not eliminate your risk of hiv. You can get a rapid test now and then in a few months confirm the results with a blood test.